The Boston Globe published four opinion pieces urging Sen. Elizabeth Warren to run for president saying the challenge to Hillary Clinton would be good for the presidential election. Now Hillary Clinton's speaking about Warren's main issue: income inequal watch

At the White House's 5th Annual Science Fair, President Obama laid out the ground rules (no explosions, please), met some super Girl Scouts, made some waves (literally), and noticed how the robots get smarter every year saying, "You're on notice, Skynet." watch

Nicholas Menditto won a case before the Connecticut Supreme Court that will allow some minor pot offenses to be erased from criminal records. Menditto and his lawyer Aaron Romano talk to Ari Melber about why this case is important and what the national im watch

An anti-bullying video was inspired by a Jimmy Kimmel segment where celebrities and even Pres. Obama read mean tweets about themselves. Pia Glenn, Liz Plank and Jonathan Capehart discuss how social media impacts everyone from The White House to the playgr watch

Mitt Romney told Katie Couric that he wishes he spent more time reaching out to minorities during his 2012 presidential campaign. He also calls Jeb Bush a "formidable" candidate. David Axelrod, Richard Wolffe and Beth Fouhy join Ari Melber. watch

“Washington Examiner” reporter Susan Crabtree, who’s followed the multiple scandals of the Secret Service, talks about the lawmakers who are unhappy with the agency’s leadership and the allegations that there is a “culture of cover-up” in the Secret... watch

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Lawrence O’Donnell brings his extraordinary background in politics and entertainment to “The Last Word with Lawrence O’Donnell,” airing weeknights on MSNBC. Drawing upon his experience as a former chief of staff on the Senate Finance Committee and as an Emmy-winning executive producer and writer of “The West Wing,” O’Donnell gives the last word and rewrites the most compelling stories of the day.